Thanks for pointing me at the screencaps site. Wow, they've really simplified the devil's traps since the pilot. I guess that makes sense, since the boys don't usually have hours and hours to draw protection symbols, plus it's hard to do fine details with spray paint.

Now that I've had a chance to double-check, yay! I correctly remembered Sam using orange spray paint (http://www.homeofthenutty.com/supernatural/screencaps/displayimage.php?album=56&pid=15914#top_display_media) in "Jus in Bello." I'm not sure I want to duplicate the 'orange spray paint on institutional linoleum' look, but I now feel justified in choosing whatever color I want. I'll have to go through the thread box again and see what goes with red, black, and white.